New Sub assembly Configurations not appearing in Assembly Design Table drop down menu?

I have a subassembly with configurations, and an assembly run by a design table which contains this subassembly.

When imputing new configurations into the sub assembly, they dont appear into the design table of the assembly.

My aim is to change the configuration of the subassemby in the assembly design table.

Has anyone come across this problem, Thanks.

SolidworksConfigurations/design Tables